Acoustic fill encapsulated in polyethylene to
eliminate erosion and absorption of gases

Acoustic stand-off between the perforated
baffle and the acoustic fill to enhance
performance

Seams are mastic filled to insure airtight units
to 8” w.g.

ASTM E-84 ratings for the acoustical fill are:

Flamespread 0

Smoke Developed 15

Components are also available in stainless steel or aluminum construction.

Acoustical performance ratings are based on tests conducted by Intertek Testing Services, formerly ETL Testing Laboratories, Inc., Cortland, New York, in accordance with ASTM E477 “Standard Method of Testing Duct Liner Materials and Prefabricated Silencers for Acoustical and Airflow Performance.” Copies of the test reports are available upon request.